Changes

# ''Azemiopinae'' Liem, Marx & Rabb, 1971 (Fea's vipers) with only one species: ''Azemiops feae'' living in [[Myanmar]], southeastern [[Tibet]] across southern [[China]] (Fujien, [[Guangxi]], [[Jiangxi]], [[Kweichow]], [[Sichuan]], [[Yunnan]], [[Zhejiang]]) to northern [[Vietnam]].

# ''Azemiopinae'' Liem, Marx & Rabb, 1971 (Fea's vipers) with only one species: ''Azemiops feae'' living in [[Myanmar]], southeastern [[Tibet]] across southern [[China]] (Fujien, [[Guangxi]], [[Jiangxi]], [[Kweichow]], [[Sichuan]], [[Yunnan]], [[Zhejiang]]) to northern [[Vietnam]].

#''Causinae'' Cope, 1859 (night adders) living in Sub-Saharan [[Africa]]

#''Causinae'' Cope, 1859 (night adders) living in Sub-Saharan [[Africa]]

#''Crotalinae'' Oppel, 1811 (pit vipers: rattle snakes, bushmaster, cottonmouth, copperhead, jararacas) - In the [[Old World]] from eastern [[Europe]] eastward through [[Asia]] to [[Japan]], [[Taiwan]], [[Indonesia]], peninsular [[India]] and [[Sri Lanka]]. In the [[New World]] from southern [[Canada]] southward through [[Mexico]] and [[Central America]] to southern [[South America]].

#''Crotalinae'' Oppel, 1811 (pit vipers: rattle snakes, bushmaster, cottonmouth, copperhead, jararacas) - In the [[Old World]] from eastern [[Europe]] eastward through [[Asia]] to [[Japan]], [[Taiwan]], [[Indonesia]], peninsular [[India]] and [[Sri Lanka]]. In the [[New World]] from southern [[Canada]] southward through [[Mexico]] and [[Central America]] to southern [[South America]].